US3307773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Readily closable and reopenable plastic bag
Assignee: Union Carbide Corp
•
Filing: 1963-03-26
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Granted: 1967-03-07
•
Expires: 1983-03-26
Abstract
No abstract record available.
Inventors
- 👤 James C Kratzer
- 👤 Wilton Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:29
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/18; B65D33/20; Y; Y10; Y10S; Y10S229/00; Y10S229/938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A READILY CLOSABLE AND REOPENABLE BAG MADE OF A FLEXIBLE PLASTIC MATERIAL; SAID BAG HAVING A FIRST WALL AND OPPOSITE SAID FIRST WALL A SECOND WALL, AN OPEN END BETWEEN SAID FIRST AND SECOND WALLS, AND A FLAP EXTENDING FROM SAID FIRST WALL FOR FOLDING OVER SAID OPEN END AND AGAINST SAID SECOND WALL, THEREBY CLOSING SAID OPEN END; AND SAID BAG HAVING A THIN FILM THEREON, ON AT LEAST ONE SURFACE WHICH EXISTS BETWEEN SAID FLAP AND SAID SECOND WALL WHEN SAID FLAP IS FOLDED OVER, CONSISTING ESSENTIALLY OF FROM 54 TO ABOUT 59% BY WEIGHT OF A MONOGLYCERIDE SELECTED FROM THE GROUP CONSISTING OF GLYCEROL MONOSTEARATE AND GLYCEROL MONOOLEATE, NOT MORE THAN 0.5% BY WEIGHT OLEIC ACID, AND THE REMAINDER DIGLYCERIDES AND PROPYLENE GLYCOL; SAID FILM CAUSING SAID FLAP TO CLING TO SAID SECOND WALL WHEN SAID FLAP IS FOLDED OVER.
Claim 2
Dependent Claim
143 words
A READILY CLOSABLE AND REOPENABLE BAG MADE OF A FLEXIBLE PLASTIC MATERIAL; SAID BAG HAVING A FIRST WALL AND OPPOSITE SAID FIRST WALL A SECOND WALL, AN OPEN END BETWEEN SAID FIRST AND SECOND WALLS, AND A FLAP EXTENDING FROM SAID FIRST WALL FOR FOLDING OVER SAID OPEN END AND AGAINST SAID SECOND WALL, THEREBY CLOSING SAID OPEN END; AND SAID BAG HAVING A THIN FILM THEREON, ON AT LEAST ONE SURFACE WHICH EXISTS BETWEEN SAID FLAP AND SAID SECOND WALL WHEN SAID FLAP IS FOLDED OVER, CONSISTING ESSENTIALLY OF FROM 54 TO ABOUT 59% BY WEIGHT OF A MONOGLYCERIDE SELECTED FROM THE GROUP CONSISTING OF GLYCEROL MONOSTEARATE AND GLYCEROL MONOOLEATE, NOT MORE THAN 0.5% BY WEIGHT OLEIC ACID, AND THE REMAINDER DIGLYCERIDES AND PROPYLENE GLYCOL; SAID FILM CAUSING SAID FLAP TO CLING TO SAID SECOND WALL WHEN SAID FLAP IS FOLDED OVER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |